/*
 * Copyright 2019-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.gitee.vueantd.common.utils;

import java.text.SimpleDateFormat;
import java.time.*;
import java.time.format.DateTimeFormatter;
import java.util.Date;

/**
 * @author: liaojinlong
 * @date: 2020/6/11 16:28
 * @apiNote: JDK 8  新日期类 格式化与字符串转换 工具类
 */
public class DateUtil {

  public static final DateTimeFormatter DFY_MD_HMS = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
  public static final DateTimeFormatter DFY_MD = DateTimeFormatter.ofPattern("yyyy-MM-dd");

  /**
   * LocalDateTime 转时间戳
   *
   * @param localDateTime /
   * @return /
   */
  public static Long getTimeStamp(LocalDateTime localDateTime) {
    return localDateTime.atZone(ZoneId.systemDefault()).toEpochSecond();
  }

  /**
   * 时间戳转LocalDateTime
   *
   * @param timeStamp /
   * @return /
   */
  public static LocalDateTime fromTimeStamp(Long timeStamp) {
    return LocalDateTime.ofEpochSecond(timeStamp, 0, OffsetDateTime.now().getOffset());
  }

  /**
   * LocalDateTime 转 Date
   * Jdk8 后 不推荐使用 {@link Date} Date
   *
   * @param localDateTime /
   * @return /
   */
  public static Date toDate(LocalDateTime localDateTime) {
    return Date.from(localDateTime.atZone(ZoneId.systemDefault()).toInstant());
  }

  /**
   * LocalDate 转 Date
   * Jdk8 后 不推荐使用 {@link Date} Date
   *
   * @param localDate /
   * @return /
   */
  public static Date toDate(LocalDate localDate) {
    return toDate(localDate.atTime(LocalTime.now(ZoneId.systemDefault())));
  }


  /**
   * Date转 LocalDateTime
   * Jdk8 后 不推荐使用 {@link Date} Date
   *
   * @param date /
   * @return /
   */
  public static LocalDateTime toLocalDateTime(Date date) {
    return LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault());
  }

  /**
   * 日期 格式化
   *
   * @param localDateTime /
   * @param patten        /
   * @return /
   */
  public static String localDateTimeFormat(LocalDateTime localDateTime, String patten) {
    DateTimeFormatter df = DateTimeFormatter.ofPattern(patten);
    return df.format(localDateTime);
  }

  /**
   * 日期 格式化
   *
   * @param localDateTime /
   * @param df            /
   * @return /
   */
  public static String localDateTimeFormat(LocalDateTime localDateTime, DateTimeFormatter df) {
    return df.format(localDateTime);
  }

  /**
   * 日期格式化 yyyy-MM-dd HH:mm:ss
   *
   * @param localDateTime /
   * @return /
   */
  public static String localDateTimeFormatyMdHms(LocalDateTime localDateTime) {
    return DFY_MD_HMS.format(localDateTime);
  }

  /**
   * 日期格式化 yyyy-MM-dd
   *
   * @param localDateTime /
   * @return /
   */
  public String localDateTimeFormatyMd(LocalDateTime localDateTime) {
    return DFY_MD.format(localDateTime);
  }

  /**
   * 字符串转 LocalDateTime ，字符串格式 yyyy-MM-dd
   *
   * @param localDateTime /
   * @return /
   */
  public static LocalDateTime parseLocalDateTimeFormat(String localDateTime, String pattern) {
    DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(pattern);
    return LocalDateTime.from(dateTimeFormatter.parse(localDateTime));
  }

  /**
   * 字符串转 LocalDateTime ，字符串格式 yyyy-MM-dd
   *
   * @param localDateTime /
   * @return /
   */
  public static LocalDateTime parseLocalDateTimeFormat(String localDateTime, DateTimeFormatter dateTimeFormatter) {
    return LocalDateTime.from(dateTimeFormatter.parse(localDateTime));
  }

  /**
   * 字符串转 LocalDateTime ，字符串格式 yyyy-MM-dd HH:mm:ss
   *
   * @param localDateTime /
   * @return /
   */
  public static LocalDateTime parseLocalDateTimeFormatyMdHms(String localDateTime) {
    return LocalDateTime.from(DFY_MD_HMS.parse(localDateTime));
  }

  public static String DateFileName() {
    SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd_HHmmss");
    return sdf.format(new Date());
  }
}
